fix(gui): a photo viewer bar that reads on any photo

The bar's white-on-translucent-white buttons vanished over a bright photo,
and eight look-alike icons, a floppy disk and an open-document glyph among
them, left the user guessing. The bar now holds the favorite, the details
and a menu with Slideshow, Save a Copy, Open With, Add to Album, Show on
Map and Move to Trash, on dark discs that read over white and black
alike.

A shot stored as more than one file shows a labelled pill ("RAW", "Live",
"2 of 3") instead of a paged icon, lit while the second file is shown.
The title is the localized full date instead of a raw timestamp.

Delete asks first, as the grid does: the dialog opens over the viewer,
and the album prompts can open there too. Alt+Left closes the viewer and
F10 opens the menu; the shortcuts window lists F5, F10 and Alt+Left.

docs/CHANGELOG.md

@@ -136,6 +136,14 @@ Existing folders stay device backups. Older builds cannot open the upgraded data
 - **A search in My files stays.** It was replaced by the folder's listing whenever files
   changed, on refresh and on coming back to the page, while the query stayed in the box.
 
+- **The photo viewer's buttons are readable on any photo.** They were white on a see-through
+  white, and vanished over a bright photo. The bar now keeps only the favorite star, the details
+  and a menu, which names Slideshow, Save a Copy, Open With, Add to Album, Show on Map and Move to
+  Trash in words where eight icons stood. A shot stored as more than one file shows a "RAW" or
+  "Live" switch, or "2 of 3" for a burst, where an unlabelled icon was. The title reads
+  "Wednesday, October 7, 2026, 13:42" rather than a timestamp. Delete asks first, as it does in
+  the grid, and Alt+Left closes the viewer.
+
 - **A date jump in Photos stops when you look elsewhere.** A jump still loading the timeline
   kept going after another filter, album or place was opened.